Decoding apparatus and decoding method

Details Decoding apparatus and decoding method Decoding apparatus and decoding method

2007-10-30

2009-02-24

Jeanglaude, Jean B (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from code based on probability

C341S050000, C341S051000, C341S065000, C714S767000

Reexamination Certificate

active

07495588

ABSTRACT:
A decoding apparatus includes a state variable calculation unit which calculates a second state variable based on a first context variable and a first state variable which are stored in a first memory unit and a second memory unit, respectively, and determines a selection signal representing a symbol as a result of arithmetic decoding processing. A context variable calculation unit calculates a second context variable based on the first context variable and the selection signal and updates the first memory unit. A re-normalization unit calculates a third state variable by using the coded data and the second state variable and updates the second memory unit. The state variable calculation unit outputs the determined selection signal that is usable in processing of a succeeding step without waiting for the operations of the context variable calculation unit and the re-normalization unit.

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The above reference was cited in an Oct. 31, 2008 US Office Action that issued in related U.S. Appl. No. 11/927,892, a copy of which is enclosed.
U.S. Appl. No. 11/927,892, filed Oct. 30, 2007, Katsumi Otsuka.
Series H: Audiovisual and Mutlimedia Systems; Infrastructure of Audiovisual Services—Coding of moving video: Advanced video coding for generic audiovisual services, ITU-T Recommendation H.264 | ISO/IEC 14496-10 AVC, approved Mar. 2005 http://www.itu.int/rec/T-REC-H.264/en.
Series H: Audiovisual and Mutlimedia Systems; Infrastructure of Audiovisual Services—Coding of moving video: Reference software for H.264 advanced video coding, H.264 Reference Software Joint Model ver9.0, approved Mar. 2005 http://www.itu.int/rec/T-REC-H.264.2/en.

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